Umbrella stand



FIG. 1 is a front and top perspective view of an umbrella stand, showing my new design;

FIG. 2 is a rear and bottom perspective view thereof;

FIG. 3 is a front elevation view thereof;

FIG. 4 is a rear elevation view thereof;

FIG. 5 is a left side elevation view thereof;

FIG. 6 is a right side elevation view thereof;

FIG. 7 is a top plan view thereof; and,

FIG. 8 is a bottom plan view thereof.

The broken lines in the figures illustrate portions of the umbrella stand that form no part of the claimed design. 

CLAIM The ornamental design for an umbrella stand, as shown and described. 